Mawonedwe ambiri apulasitiki masterbatch
Pulasitiki masterbatchamawonedwa ngati ma polimamasterbatch.Ma polima amatha kupangidwa kuchokera ku mitundu yosiyanasiyana ya 'mers' yomwe imayimira mayunitsi a mankhwala.Mafuta ambiri amapangidwa kuchokera ku mafuta kapena ma hydrocarbons ena.Ma hydrocarbons ali monga momwe amawonekera, opangidwa ndi haidrojeni ndi kaboni.Chifukwa chake, mapulasitiki amapangidwa ndi (makamaka) haidrojeni ndi kaboni omwe adasonkhanitsidwa pamodzi kuti apange ma mer (monga ethylene kapena propylene) ndiyeno ma mers awa amalumikizana kupanga unyolo ndipo unyolowu ukakhala wautali wokwanira kukhala 'poly' nthawi zambiri pomwe osachepera. 100 mwa ma mers adalumikizana, timakhala ndi pulasitiki / polymeric.
Pulasitiki masterbatchndi a m'banja la thermoplastic amapangidwa ndi mamolekyu amtaliatali omwe amakhala makamaka carbon ndi haidrojeni otchedwa ma polima.Mawuwa amaphatikiza "poly" kutanthauza zambiri ndi "mer" kutanthauza mayunitsi omwe amabwereza mamolekyu omwe amalumikizidwa palimodzi.Zigawo zamagulu amitundu yosiyanasiyana ya mapulasitiki, mphamvu ya mamolekyu a mamolekyu omwe amagwirizira ma mers kwa wina ndi mzake ndi kutalika kwa unyolo wa polima ndizozidziwikiratu za pulasitiki.Mapulasitiki ena amasintha mitundu yambiri ya mayunitsi a mer.
Pulasitikimasterbatcha banja la thermoset pomwe ofanana ndi omwe tafotokozawa ali ndi maulalo osiyanasiyana pakati pa ma mers kuphatikiza maulalo omwe amawapatsa zinthu zosiyanasiyana kuphatikiza pakubwera kutsika kwapamwamba kwa kutentha komanso kulephera kusungunuka kusanawole pamene kutentha kumawonjezeka.
Kuphwanya pulasitiki masterbatch
Zambiri zapulasitiki masterbatchwasweka mu crackers!
Steam crackers makamaka.Koma osati kokha.
Pali gulu lonse la thermoplastics zomwe zimachokera ku zopangira zotchedwa ethylene.Ndipo ethylene amapangidwa m'njira zosiyanasiyana, makamaka kuchokera kumafuta kapena gasi.
Njira imodzi yodziwika kwambiri ndikuyika chakudya chamafuta mu chofufumitsa cha nthunzi ndikutulutsa ethylene, kuphatikiza zinthu zinanso.The ethylene ndiye polymerized mu polyethylene kapena polypropylene makamaka koma osati kokha.PVC, PS, PET, butadiene amapangidwanso.
Nachi kamutu kankhani kakufotokoza zimenezopulasitiki masterbatchbwino kwambiri:
“Ethylene ndiye poyambira zinthu zinayi zokhwima kwambiri: polyethylene (mitundu itatu: LDPE, LLDPE, ndi HDPE), ethylene oxide, ethylene dichloride (kalambula bwalo wa vinyl chloride monomer), ndi ethylbenzene (kalambula bwalo wa styrene).Zochepa zazing'ono, zopangidwa mwapadera kwambiri zimaphatikizapo mizere ya α-olefin, vinyl acetate monomer, ndi ethanol yopanga, ndi zina zambiri."
M'munsimu muli mndandanda wa ena otchuka ethylenemasterbatchmankhwala:
| PVA Poly(vinyl acetate), poly(vinyl mowa) | PET Poly (ethylene terephthalate) |
| PVC Poly (vinyl chloride) | PS Polystyrene |
| LLDPE Linear low-density polyethylene | PEG Poly (ethylene glycol) |
| LDPE Polyethylene yotsika kwambiri | HDPE High kachulukidwe polyethylene |
Njira yomwe imapangidwira kwambiri yopita ku ethylene ndiyo kutulutsa mpweya wamafuta (ethane, propane, kapena butane) kapena zakudya zamadzimadzi (naphtha kapena mafuta a gasi).Pakutentha kwambiri kochokera ku 850 digiri Celsius kapena kupitilira apo, mindandanda yazambiri yamakina osagwiritsa ntchito makina yayendetsedwa.Ethylene ndiye chinthu chomwe akufuna;koma mamolekyu ena ofunika kwambiri omangira, monga propylene, butadiene, ndi benzene, amapangidwa pamodzi.
Zokolola za coproduct iliyonse nthawi zambiri zimagwira ntchito pazakudya zomwe zimagwiritsidwa ntchito.Kusweka kwa ethane kumapereka pafupifupi palibe coproducts;koma naphtha yosweka imapereka kuchuluka kwa propylene, butadiene, ndi benzene.Monga momwe zimawonera padziko lonse lapansi, kuphulika kwa nthunzi kumatha kuwonedwa ngati chimodzi mwazinthu zofunika kwambiri za butadiene, propylene komanso gwero lotsogola la benzene.Chithunzi chotsatirachi chikuwonetsera ndondomeko ya ndondomeko yowonongeka ya steaming m'njira yosavuta kwambiri.
Nthawi yotumiza: Apr-07-2022